【摘要】 基础隔震技术可以实现核电厂上部结构和内部设备、管道的标准化设计,并提高结构体系的抗震裕度。考虑到设备和管道的抗震要求,提出了一种核电厂三维基础隔震技术。首先采用单质点简化模型进行参数分析,确定了隔震层的合理参数。其次设计开发了三维隔震装置,包括厚层橡胶隔震支座和油阻尼器,并进行了相关的检测试验。最后进行了几何缩尺比例为1/15的振动台试验,模型包括三维隔震模型和传统水平隔震模型以及非隔震模型。试验证明:三维隔震系统在水平方向具备与传统隔震系统相同的隔震性能,并且可以有效地实现核电厂内部设备及管道的竖向隔震。更多还原

【Abstract】 The base isolation technique could provide nuclear power plants a larger seismic margin from design earthquakes and standardize the seismic design procedure for various seismic fortification intensities.Considering the seismic demands from facilities and pipes within plants,a three-dimensional base isolation system is proposed.It is first numerically examined by simplified models to search for suitable parameters for the base isolation layer.Then a laminated rubber bearing with thick rubber layers and an oil damper with adjustable flow rate are developed and experimentally examined.1/15 scaled shaking table tests are conducted on two models using three-dimensional and horizontal-only isolators,respectively,and one primary model without isolation.It is found that three-dimensional isolation systems exhibit the same performance as the traditional isolation systems in the horizontal direction and could avoid dominated frequencies of most facilities and pipes within the plants in the vertical direction.更多还原